Converting a JSON.NET JObject's Properties/Tokens into Dictionary Keys

Question

I\'m using JSON.NET to parse a JSON reponse from openexhangerates.org server side using .NET. The response contains a nested object (\"rates\") which has a long list of nume

Answer 1

JObject already implements IDictionary, so I suspect that when you've navigated down to the rates member, you should be able to use:

var result = rates.ToDictionary(pair => pair.Key, pair => (decimal) pair.Value);

Unfortunately it uses explicit interface implementation, which makes this a bit of a pain - but if you go via the IDictionary interface, it's fine.

Here's a short but complete example which appears to work with the JSON you've provided (saved into a test.json file):

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Newtonsoft.Json.Linq;

class Test
{
    static void Main()
    {
        JObject parsed = JObject.Parse(File.ReadAllText("test.json"));
        IDictionary rates = (JObject) parsed["rates"];
        // Explicit typing just for "proof" here
        Dictionary dictionary =
            rates.ToDictionary(pair => pair.Key,
                               pair => (decimal) pair.Value);
        Console.WriteLine(dictionary["ALL"]);
    }
}